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Photoresponsive Supramolecular Systems: Self‐Assembly of Azodibenzoic Acid Linear Tapes and Cyclic Tetramers
Author(s) -
Rakotondradany Felaniaina,
Whitehead M. A.,
Lebuis AnneMarie,
Sleiman Hanadi F.
Publication year - 2003
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200304864
Subject(s) - azobenzene , photoisomerization , supramolecular chemistry , stacking , self assembly , hydrogen bond , molecule , materials science , isomerization , crystallography , chemistry , nanotechnology , catalysis , organic chemistry
A new strategy to effect photoinduced control over molecular self‐assembly is reported. This strategy uses the reversible trans – cis photoisomerization of a novel azobenzene system, where the trans ‐ and cis ‐forms self‐assemble into dramatically different higher‐order structures. The trans ‐azobenzene form of this molecule associates into infinite hydrogen‐bonded linear tapes, while the cis ‐azobenzene form undergoes hydrogen‐bonded self‐assembly into cyclic tetramers. This results in a second level of association, where the cis‐ hydrogen‐bonded supramolecular cycles ultimately form long, rod‐like aggregates through stacking interactions.